Lawn-sprinkler.



W. VAN E. THOMPSON.

LAWN SPRINKLER. APPLICATION FILED DEG. 2a, 1910.

Patented Dec. 3, 1912.

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LAWN-SPRINKLER.

Specification of Letter Pat n Patented Dec. 3, 19312.

Application filed December 28, 1910. Serial No. 599,709.

Be it known that I, WALTER VAN E. THonPsoN, a citizen of the United States residing in the city of Los Angeles, county of Los Angeles, State of California, have invented new and useful Improvements in Lawn-Sprinklers and in the Process of Manufacturing the Same, of which the following is a specification. v

Heretofore in the manufacture of that class of lawn sprinklers, in which the water is admitted into a chamber tangentially and escapes therefrom through an orifice central to the chamber. it has been the custom to cast the sprinklers out of metal and to finish the central outlet orifice by cutt ing the metal In the casting such sprinklers a sand core is used, and it is very dilticult it not impossible, to get these cores always oi' the same size. thereby producing in thc sprinklers an un evenness o'f chambcr area and therefore an unevenness as to capacity in ditl'crent sprinklers. \Vaste in the manufacture of such sprinklers occurs owing to the fact that there is more or less moisture in the sand cores which sometimes results in a blow hole which extends entirely through the body of the sprinkler rendering it useless. in other cases the blow holc extends so near through the body that when the sprinkler is put into use the pressure of the water blows out the hole and renders the sprinkler useless. This is particularly noticeable in that class of sprinklers called twin s1 'inklers where two chambers lie side by side and are supplied with water l'rom a common inlet which 0 ens into both chambers. In these sprinklbrs, the chambers are nearly the segment. of a hollow globe.

it is the object. of my invention to do away with the use, ol 'the sand core in the casting of such sprinklers and to use in lieu thereof a metallic hollow core, which forms the lining ot the chamber in the completed sprinklcr said core having a central outlet for each chamber and a common inlet for the two chambers. l accomplish this object by the sprinkler describtal herein and illustrated in the aecompanyinp di'av.'in s,sl1owin a twin filillllh'ltl in whi h-- Figure l is a top plan view of my im-Y Fin". '2 is a rear end clevation partly in section being out on the To all whom it may concern:

line 2-2 of Fig. 1. Fig. 3 is a bottom plan view of the metallic core with a part of the bottom plate broken away for clearness of illustration and with a portion ofthe upper part in the position it is in before the bottom is secured to the top. Fig. at is a plan of the blank sheet of metal for the formation of the top port-ion of the core. Fig. 5 is a view of the sheet of metal which forms the bottom of the core. I cut blank 10 from thin sheet metal of such nature that it can be drawn and of the shape shown in Fig 4. I prepare dies not shown, which will )ress the blank into shapeto form the top o the core or the lining 11 of the upper portion otchamber 12 in a 7d (anupleted sprinklcr, and afterward I punch a central aperture 9 for each chamber. I cut another blank 13 as shown in Fig. 5, which forms a closure. for the bottom of the core and bottom of completed lining. AS shown in Fig. 4, the blank for the top p0rtion has a large projection 15 which is formed into an arch by the dies and forms the top 16 of the inlet to and between the inlet sides of the chambers. The blank 10 also has smaller projections 17, which when the bottom plate is positioned for use as shown in Fig. 3, are folded over upon the bottom plate as shown at the right in Fig. 3. thereby completing the core. This core is positioned in suitable dies for casting the outside shell 18 around the same. The outer shell has a neck 19, the outer part ofwhich is enlarged and interpally threaded for the reception of the threaded end of the coupler in the end of the hose. not shown.

ly the use of the metal core formed in the manner before des 'ibed, a perfect lining is provided for the sprinkler and uniform chamber capacity is provided for every sprinkler, so that there is no unevenness of capacity between the sprinklers. As there is no moisture in the core, there are no blow holes extending partly or entirely through.

the body, and conse pn-*ntly no defective sprinklers. thus saving the waste heretofore ia-casiontat by blow holes in casting such sprinklers. As the mold is so constructed that the cast metal is kept a short distance away trout the central aperture in the top of the core. the central opitice requires no tinishing and the s nhiklct as soon as it is cast and the shank threaded is ready for use.

In the drewingsl have shown a twin sprinbody around said lining except at the top kler, but a sprinkler with a, single chamber orifice and side inlet, said body having hose can be constructed in like manner. attaching means at the inlet.

Having described my invention, what I In Witness that I claim the foregoin I 5 claim is:- have hereunto subscribed my name '0 is 15 "As anew article of manilfaeihne a lawn 22nd day of December 1910.

sprinkler having a, chamber provided with WALTER VAN E. THOMPSON. a sheet metal lining, said lining having an Witnesses: orifice in the top and a tangential inlet in G. E. HARPHAM,

10 the side, and an integral continuous cast 0. H. GATQHEL. 

